Which Logix500 controller mode allows project editing but not code execution?

The mode that allows for project editing without executing the controller's code is Program mode. In this mode, users can make changes to the logic, tags, and configurations of the project without those changes being active or affecting the running processes on the controller. This is essential for developers and engineers who need to modify or update programs safely, ensuring that any edits made do not disrupt the operations until they are ready to apply and execute the updated code.

In Program mode, the logic can be fully edited and reviewed without any risk of impacting actual machine or system operations since the code remains inactive. Once the project is complete and thoroughly tested, transitioning to a different mode, like Run Mode, will allow for the execution of the code with the new changes implemented.

Other modes, such as Remote mode and Remote Test Mode, have distinct purposes that do not prioritize project editing in the same way. Run Mode is specifically for executing the code, thus it does not allow for editing while active processes are running. Understanding the functionality of each mode is crucial for effective programming and maintenance of Logix500 systems.